Why do background windows have semi-transparent title bars in Unity? The foreground window is entirely opaque, but as soon it loses focus, it becomes transparent. It's as though Unity/Gnome are configured to make background titlebars transparent to indicate they are not on top instead of greying them.
Compiz? Unity? Video Card Driver? X.org?
Is there a setting to change this? None of the standard settings nor the tweaks in any of the tweaking tools I have tried seem to have any effect.
I noticed this a while back, so I don't think it's an Ubuntu 12.10 thing.
I tried to post a screenshot, but I don't have 10 reputation yet.
EDIT: You kids and your newfangled "image posting sites"... Screenshot